//LuoguUid:397712
//UserName:dingyibo

#include <bits/stdc++.h>

#define MAX_N 100050
#define INF 2147483647

using namespace std;

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);

    freopen("arena.in", "r", stdin);
    freopen("arena.out", "w", stdout);

    

    return 0;
}